Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4c7da1e5d61f8a5…

MALICIOUS

PDF

47.2 KB Created: 2020-08-09 02:15:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6e61d8730a4a54f2e4301dd6f0b51c64 SHA-1: 0e1d8f6b63e2a8659c84923bfee4193873206f02 SHA-256: a4c7da1e5d61f8a5efacbb05a19940af4255c355811318f4817b9947633ba0d1
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=junior+assistant+question+paper+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to external PDFs, many hosted on cdn.shopify.com. The document body, though partially corrupted, contains text suggesting a lure related to a 'junior assistant question paper' and includes the malicious URL, reinforcing the phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=junior+assistant+question+paper+pdf In PDF document text
    • http://files.forkedontherhode.com/uploads/1/3/1/4/131452735/xivepixegitor.pdfIn PDF document text
    • http://files.alexabowman.com/uploads/1/3/2/8/132816195/9766182.pdfIn PDF document text
    • http://files.designinginmydreams.com/uploads/1/3/0/7/130739520/abf1d27f14.pdfIn PDF document text
    • http://files.northshorecustomconversions.co.uk/uploads/1/3/1/1/131164419/e988c89d7404930.pdfIn PDF document text
    • http://files.nickpateras.org/uploads/1/3/2/7/132710655/d914f150ae.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4356/8278/files/42084146515.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6434/5255/files/vuxererifixijapuwexurasad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75130531250.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2385/9873/files/minecraft_pc_xbox_controller.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0814/8127/files/fuluwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6381/0975/files/61528687354.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2520/2332/files/free_blueprint_maker.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7531/9448/files/87170279371.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7818/0257/files/zodepemuputo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51025654711.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0437/7763/files/wogofugenupuroju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2572/6625/files/fozuwaxuwitanuku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5598/0439/files/57928850852.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2884/8538/files/sifibepupa.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007b82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B82 5116 bytes
SHA-256: 275a289a1aa583608ad6ac98d51401a76b2df31455089ae458dd8e3d0d377df8
font_01_sfnt_off00008cfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CFB 10016 bytes
SHA-256: fc128b2d514d6f7f60f75da8d99fd9d9c481baa725c4653fa3c6c86e8cea8766

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